ANIMALS: fourth stomach of a ruminant?

Questions

Who said There is no terror in a bang, only in the anticipation of it?

What is a snake doing when it sloughs?

What material did the Ancient Greeks call elektron and from which we get the word electricity?

Which country is 2790 miles long but only 250 miles wide at its widest point?

From which London palace did the BBC transmit the first Tv service?